Book-holder and line-guide



C. l.. DAHLBERG.

BOOK HOLDER AND LINE GUIDE. APPLICATION FILED JULY 31.!918.

1,3 1 7,004. Patented Sept. 23, 1919.

ml comma PLANOORAPII c0, WASHINGTON. D. c.

CHARLES L. DAI-ILBIERG, OF DES MOINES, IOWA.

BOOK-HOLDER AND LINE-GUIDE.

Specification of Letters Patent.

Patented Sept. 23, 1919.

Original application filed August 20, 1917, Serial No. 187,242. Dividedand this application filed July 31,

- 1918. Serial No. 247.685.

To all :whom it may concern;

Be it known that I, CHARLES L. DAHL- BERG, a citizen of the UnitedStates, and resident of Des Moines, in the county of Polk and State ofIowa, have invented a certain new and useful Book-Holder and Line-(lruide, of which the following is a specificat1on. i

r The object of m invention is to provide a book holder and line guideof simple, durable and inexpensive construction, so arranged that it maybe readily, quickly and easily adjusted for holding books of all orditheopposite sides of the book, with a combined weight and line indicatoradjustably mounted so that the line indicator may lie substantially flaton books of any size, and also with a means for adjusting the bookholder relative to the line guide for accommodating the device to booksof unusually great thickness, whereby the objects contemplated areattained as hereinafter more fully setforth, pointed out in my claim,and illustrated in the accompanying drawing, in which:

Figure 1 shows a perspective view of my improved device, part of one ofthe book supporting members being broken away to show the adjustablefeature.

Fig. 2 shows an enlarged, sectional view illustrating the adjusting boltfor the book holder.

Fig. 3 shows an enlarged, detail, plan view of the adjustable bolt forthe book holder, and the equalizing bar and connected parts.

Fig. 4 shows a detail front view of the adjustable swinging support forthe supporting rod of the line guide.

Fi 5 shows a side view of same, the dot- 65 ted lines showing thesupport for the line guide rod in different positions of its adjustment;and

F g. 6 shows a similar detail view illustratlng the means for limitingthe upward movement of the line guide rod support.

Referring to the accompanying drawings, I have used the referencenumeral 10 to indicate the base of the device, upon which are the sldeguide plates 11. At the longitudinal center of the base is a guide strip12, and between the guides 11 and 12 on each side is a sliding booksupporting base plate 13.

Hinged to each book supporting base plate 13 is a book support 15, andthese booksupports are capable in one position of lying flat against thebase member 13, or of being supported in an upwardly and rearwardlyinclined position, as shown in F ig. 1, by means of the pivoted lugs 15.At the bottom of each book support is a shelf 16 to engage and hold thelower edge of the book.

At about the central portion of the guide 12 and base 10 is a slot 17extending parallel with the sides of the base. At the bottom of the slotis a recess 18 to receive the head 19 of a bolt 20. At the upper end ofthe bolt is anut 21 mounted on the bolt, and a washer 22 is also placedon the bolt, which washer has an upwardly extending flange 23 to engagethe nut.

Pivotally mounted on the upwardly extending part 23 of the washer 22 isan equalizing bar 24 extended transversely of the base. Thisequalizingbar is provided with slots 25 at its ends, through which slotsthe pins 26 are projected, and which pins are supported in the bookholder base members 13.

Bytthis arrangement it is obvious that when one of the base members 13is moved forwardly, the other is moved rearwardly to a COI'IBSPOIldlIlgdegree, and it is also obvious that by loosening the nut 21 theequalizing bar 24 and both of the slidin base members 13 may be adjustedforwar ly or rearwardly, as desired.

Secured to the front of the central guide 12 is a base 28 having anupright 29. This upright is provided with a shoulder at 30, for purposeshereinafter made clear.

Mounted on the opposite sides of the upright 29 are the two bars 27constituting the support for the line guide rod. These bars 27 arepivotally connected to the support 29 by the pivot pin 31, and alimiting pin 32is fixed to these bars and. is designed in one positionto engage the shoulder so that the forward movement of the supportingbars 27 is thereby limited, although the movement in a rearwarddirection is not limited. At the upper part of the supporting bars '27the line guide supporting "rod 33 is inserted between the bars 27, andis capable of being firmly and adjustably clamped therein by the setscrew 35.

Q Slidingly-mounted upon the rodw33-is a combined weight and line guide34,;adjust-i ably mounted on :the rod 33 by the set screw Formed .in-thebars 27. is ajseries of openings 36, into Which the set screw 35 may beinserted, if desired, 5 for giving additional adjustment to :the lineguide rod 33. The shape of thefcombined-Weight and line guide is suchthat its fiatjbase will lie substantially flat upon the pages of a bookheld in the book holder, and its upper'edge ,is taperedito form a thin,straight edge 'to serve'as a line guide. 7

In practical useand assuming that the device-is adjusted to the positionshown in Fig. 1,.then an operator places a book 1 in 1 position restingupon the-book h0lder memshall lie approximately fiat on'the printedpages,'and this means thatthe line guide rod33 must be'substantiallyparallel with the open'face'of the book. To accomplish this adjustment,the operator need only loosen the set screw 35 and Lthenswing the rod 33to position substantially parallel with the open faceiof the book, andthen I tighten the set screw, whereupon the line guide rod Will be inposition and willremain substantially parallel with the face of thebook, and this adjustment is not disturbed'when, the entire line guideis swung awayfrom the book and back again, either to replace the samebook or another one of the same thickness. 7

posed pages of the book has been read, the

the reading of the exposed pages has been finished,

. ,Asfast as the printed matter on theex In the event that an unusuallythick-o1.

thin book is being used,and itjislnot convenient or-possible to providethenecessary adjustment by means of the line guide'lrodfl adjustingdevice, then ,the, operator- {may readily and quickly: adjust the bolt20-100 move the entire book holder deviceeither' havingmeans for varyingthe'inclination and longitudinal position of the latter relative tothebase, an upright adapted-to :be secured to a base, a bar havingits'lowerend pivoted to the upright and having-a plurality of spacedopenings adjacent to its other end, means for limiting the pivotalmovement'of'said bar in one'directiom-arod havingfl'one end adapted tobeselectively pivoted 1n oneof said openings, means in fixing said rodfromzpivotal movementxrelative to'the bar, a combined weightf and lineguide-slidably mounted on said rod, and means for fixing the guideagainst 'm'ove ment relative to therod. i. V 1

"Des Moines, Iowa, July 15, -1918'.f

GHARLES L. DAHLBERG copies of this patent may be obtained for five' eents each, by addressing the Oommissioner of Patents,

, Washington, 1150.?

